Is there a way to obtain older versions of KSP?

[panzer1b]

Now its not like i NEED them per say, but im actually curious to mess with some older stuff (i actually want to have a mission to the magic boulder in older games), and im wondering where/how i could obtain an older version. Now i dont want any illegal crap, but im wondering is Squad has released them somewhere for customers to actually get them (i checked the website and couldnt find anything).

If not, im perfectly fine with that (i actually have backups of older versions, but wasnt around long enough to actually mess with some of the truly alpha/early beta editions), but id love to mess around in older games if possible, so if it isnt already available (i cant find any myself), could you guys (Squad) consider releasing this somehow for us to obtain if we want to play around in an older game variant (i own my KSP on steam, so no idea how that would work).

[Denks]

On steam you can go back to "Previous Stable Version." I am not sure what version it is.

You go to your library, right click on KSP, select properties then go to betas. The Previous Stable Version is in a drop down tab.

Again, I am not sure what version it is.

[dryer_lint]

On steam you can go back to "Previous Stable Version." I am not sure what version it is.

You go to your library, right click on KSP, select properties then go to betas. The Previous Stable Version is in a drop down tab.

Again, I am not sure what version it is.

Pretty sure that's just the last version that was uploaded... as in, 0.90

[Nemrav]

just about all released versions up to 13.3 are free (only a few hotfixes are missing) as these were before KSP became paid : http://forum.kerbalspaceprogram.com/threads/24858-Old-versions-of-KSP-%28some-versions-still-wanted%21%29

and of course some people don't delete their old version copies, if one of them is your friend, they could lend it, then well.... ok still illegal in that case but it wouldn't be mass distribution, so I think it might be safe-ish